Current Conditions - Cornwall, ON
-6°
Today's High: -1°

- Feels Like
- -12°
- Humidity
- 79%
- Pressure
- 1010.16 hPa
- Sunrise
- 07:42
- Wind
- 18km/h W
- UV
- Low
- Visibility
- 16.09km
- Sunset
- 4:26
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Hourly Weather
10 AM
-5°

11 AM
-4°

12 PM
-3°

1 PM
-2°

2 PM
-1°

3 PM
-1°

4 PM
-2°

5 PM
-2°

6 PM
-2°

7 PM
-2°

8 PM
-2°

9 PM
-2°

10 PM
-2°

11 PM
-3°

12 AM
-3°

1 AM
-3°

2 AM
-3°

3 AM
-3°

4 AM
-3°

5 AM
-3°

6 AM
-3°

7 AM
-3°

8 AM
-4°

9 AM
-3°

10 AM
-2°

11 AM
-1°

12 PM
0°

1 PM
0°

2 PM
0°

3 PM
-1°

4 PM
-2°

5 PM
-4°

6 PM
-4°

7 PM
-5°

8 PM
-4°

9 PM
-4°

10 PM
-4°

11 PM
-3°

12 AM
-3°

1 AM
-2°

2 AM
-2°

3 AM
-1°

4 AM
-1°

5 AM
-1°

6 AM
-1°

7 AM
0°

8 AM
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9 AM
1°

Daily weather forecast
Friday
-1°
-4°
Mainly sunny. Highs -2 to 0C and lows -5 to -3C.

Saturday
0°
-5°
Abundant sunshine. Highs -1 to 1C and lows -6 to -4C.

Sunday
6°
5°
Mostly cloudy. Highs 5 to 7C and lows 4 to 6C.

Monday
13°
-1°
Light rain and windy. Highs 12 to 14C and lows -2 to 0C.

Tuesday
1°
-2°
Mostly sunny. Highs 0 to 2C and lows -3 to -1C.

Wednesday
2°
-5°
Partly cloudy. Highs 1 to 3C and lows -6 to -4C.

Thursday
-3°
-5°
Mix of sun and clouds. Highs -4 to -2C and lows -6 to -4C.

Friday
1°
-2°
Mix of sun and clouds. Highs 0 to 2C and lows -3 to -1C.

Saturday
1°
-3°
Partly cloudy. Highs 0 to 2C and lows -4 to -2C.

Sunday
0°
-4°
Snow showers early. Highs -1 to 1C and lows -5 to -3C.

Radar
Latest Weather News - Durham
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What will this winter be like? Grab the hot cocoa — here’s your 2023 forecastAfter three consecutive La Niña winters, a moderate El Niño is now well established. No two are alike, so let's break down what to expect this winter.CanadaDec 1
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Snow squall watch and warning issued for a good portion of Southern OntarioEnvironment Canada issued snow squall watches and warnings for a good portion of the province as anywhere between 10 cm and 30 cm of snow is expected to fall in some areas Monday.WeatherNov 27
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‘Messy mix,’ freezing rain possible for parts of southern Ontario WednesdayA 'messy mix' of precipitation is possible for parts of southern Ontario on Wednesday, with some areas expected to see several millimetres of freezing rain.WeatherNov 7
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Ontario braces for cold weather on Halloween nightParts of Ontario could see snow and the majority of the province will be feeling the chill as children head out to trick or treat on Tuesday night.WeatherOct 30
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Parts of southern Ontario under frost warnings as weather begins to biteAn area around Toronto and another in the St. Catharines area are both under frost advisories lasting from Sunday evening into Monday morning.WeatherOct 22
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Summer storms in Ontario caused estimated $340 million in insured damages: IBCThe Insurance Bureau of Canada says severe storms and flash floods in Ontario this summer caused more than $340 million in insured losses, according to initial estimates.WeatherOct 16
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As seasons change, keep your physical, mental wellness in check with these tipsAs the summer-like October temps start to cool this Thanksgiving, many anticipate an impact to their mental health. But doctors say your physical health could be taking a hit too.HealthOct 5
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Ontario could see record-breaking heat, rich red foliage as October arrivesA full week of temperatures in the mid- to high-20s is expected across Ontario as the calendar turns to October, but the warm weather is not expected to last to Thanksgiving.WeatherSep 30
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September 2023 is off to a hot, humid start in Ontario — but will it last?Labour Day on Monday was the hottest day on record so far this year at 34 C in Toronto, surpassing a very warm June 2 at 32 C, according to data from Environment Canada.WeatherSep 7
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Toronto, parts of southern Ontario under Labour Day heat warningThe warning covers the entire Greater Toronto Area and goes beyond, including St. Catharines, Kitchener and Clarington, Ont. High temperatures are forecast to last into the week.WeatherSep 3
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Labour Day weekend weather looking ‘just about perfect’ for southern OntarioLooking ahead to the long weekend, there's good news for southern Ontario weather-wise.WeatherAug 29
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Unsettled weather, cooler temperatures expected in OntarioCooler temperatures are in the forecast for parts of Ontario, with single-digit lows even likely soon in northern areas of the province.WeatherAug 22
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Wildfire smoke from N.W.T. and B.C. affecting air quality in northern OntarioEnvironment Canada says wildfire smoke drifting from western and northern parts of the country has created hazardous air quality in parts of northern Ontario that could get worse.CanadaAug 18
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Severe storm system to hit U.S. as warnings issued for eastern Canada'Once again it looks like parts of eastern Ontario could see some strong storms Monday late afternoon to evening,' Global News meteorologist Ross Hull said.CanadaAug 7
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Central, eastern Ontario preparing for heavy rain on Civic Holiday MondayA series of weather warnings and special statements were issued across the centre and east of the province early Monday.WeatherAug 7
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Cold front to bring relief following ‘extremely hot’ conditions Friday in much of southern OntarioA heat warning covers areas including Barrie, the GTA, Hamilton, the Niagara Region, London, south to Windsor.WeatherJul 27
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Thousands without power after Ontario storm, tornado experts survey damageThousands are without power after a major storm downed trees and power lines in southwestern Ontario.WeatherJul 27
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Heat warning issued for a good portion of southern Ontario for remainder of work weekEnvironment Canada has issued a heat warning for southern Ontario which calls for the affected area to see extreme temperatures from Wednesday through Friday.CanadaJul 25
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Toronto, parts of Ontario hit by more thunderstormsEnvironment Canada issued a series of watches and warnings across much of the Greater Toronto Area and eastern Ontario on Monday afternoon.WeatherJul 24
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Tornado hits Ottawa suburb in ‘potent storm system,’ over 100 homes damagedOttawa police and city officials confirmed a tornado touched down in Barrhaven, damaging homes and downing electrical infrastructure in the area.CanadaJul 13
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Cold front to bring relief in Ontario, Quebec but heat wave lingers on coastsAreas further east will have to wait for relief as parts of Atlantic Canada remain under heat warnings set to continue Friday and last into the weekend in some areas.WeatherJul 7
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Severe thunderstorm watch issued for large part of OntarioEnvironment Canada has issued a thunderstorm watch for a large portion of Ontario on Thursday, saying severe thunderstorms are possible.WeatherJul 6
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Heat wave continues to sizzle across Canada with weather warningsParts of Ontario and Quebec are entering the third day of a multi-day heat event that Environment Canada has warned could see temperatures reach highs near 40 degrees Celsius.WeatherJul 6
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Forecasted to feel like 40 degrees across Ontario, Quebec as heat wave continuesA heat wave delivered punishing conditions across Ontario and Quebec on Wednesday, making it feel like 40 degrees and prompting warnings about heat-related illness.WeatherJul 5